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9=-64t^2
We move all terms to the left:
9-(-64t^2)=0
We get rid of parentheses
64t^2+9=0
a = 64; b = 0; c = +9;
Δ = b2-4ac
Δ = 02-4·64·9
Δ = -2304
Delta is less than zero, so there is no solution for the equation
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